Note


CHECK AND TEST 1

Step 1

Discharge refrigerant. Cut off the charging tube with pliers.

Step 2

Discharge all refrigerant toward the exhaust ven.

Step 3

Melt brazing material with flame and pull out processing tube using a pair of pliers.

Step 4

Re-braze a copper tube onto compressor processing tube.

Click below link to get more details of brazing requirements, on Annex B1

Note


Step 5

Install quick connector onto re-brazed pipe.

Step 6

Inject nitrogen gas
with 1.57Mpa pressure through quick connector into pipe.

Step 7

Please follow drawing below to perform a leakage test for brazed joints in the compressor niche.

DIAGNOSIS 1

PROCEDURE 1

Step 1

Clean paint from brazed joint.

Step 2

Cut off brazed joint with leakage.

Step 3

Use a larger copper tube to connect 2 ends of brazed joint.

Step 4

Braze the 2 ends.

CHECK AND TEST 2

Step 1

Inject nitrogen at 1.57Mpa through quick connector into pipe and use soapy water to perform leakage test again.

DIAGNOSIS 2

CHECK AND TEST 3

Step 1

Braze a piezometer onto processing tube of compressor.

Step 2

Charge nitrogen of 1.57Mpa through quick connector into pipe.

Step 3

Do leakage test on brazing points and piezometer.

DIAGNOSIS 3

CHECK AND TEST 4

Step 1

Give the system 1.57Mpa Nitrogen, and then observe if there is rust and/or spotted holes on pipes of compressor niche.

Step 2

Apply soapy water to rust area for leaking test.

DIAGNOSIS 4

PROCEDURE 2

Step 1

Clean paint off brazed joint of drying-filter.

Step 2

Cut off brazed joint with leakage.

Step 3

Use a larger copper tube to connect 2 ends of brazed joint.

Step 4

Braze the 2 ends.

CHECK AND TEST 5

Step 1

Inject nitrogen at 1.57Mpa through quick connector into pipe and use soapy water to perform leakage test again.

DIAGNOSIS 5

PROCEDURE 3

Step 1

Clean paint off brazed joint of drying-filter.

Step 2

Cut off drying-filter.

Step 3

Cut off capillary and remove the cut end by shaking.

Step 4

Braze one new drying- filter.

Step 5

Inject nitrogen (1.57Mpa) through quick connector into pipe for at least
3 min to blow remaining refrigerant away.

Step 6

Add quick connector onto processing pipe of drying-filter.

Step 7

Perform leakage test on brazed joints of drying- filter and compressor processing pipe.

Step 8

Vacuum and recharge.
Click below link to get more details for vacuuming and gas- charging requirements, go to Annex B2

Step 9

Block processing pipe twice with locking pliers.

Step 10

Leave locking pliers on the second block and cut off the rest of the pipe by shaking.

Step 11

Braze the ends and remove the pliers.

CHECK AND TEST 6

DIAGNOSIS 6

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